865046161 has 4 divisors (see below), whose sum is σ = 988624192. Its totient is φ = 741468132.

The previous prime is 865046111. The next prime is 865046183. The reversal of 865046161 is 161640568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 865046161 - 2⁷ = 865046033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865046161.

It is not an unprimeable number, because it can be changed into a prime (865046111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61789005 + ... + 61789018.

It is an arithmetic number, because the mean of its divisors is an integer number (247156048).

Almost surely, 2^865046161 is an apocalyptic number.

It is an amenable number.

865046161 is a deficient number, since it is larger than the sum of its proper divisors (123578031).

865046161 is a wasteful number, since it uses less digits than its factorization.

865046161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123578030.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 865046161 is about 29411.6670897792. The cubic root of 865046161 is about 952.8248921194.

It can be divided in two parts, 86504 and 6161, that added together give a triangular number (92665 = T₄₃₀).

The spelling of 865046161 in words is "eight hundred sixty-five million, forty-six thousand, one hundred sixty-one".